The correct option is A ₹ 470
We know that,
Surface area of cuboid
=2(lb+bh+lh)
Given that,
dimension of the box
=3 m×4 m×5 m
cost of painting
=₹ 5/m2
Now,
Surface area of box
=2(3×4+4×5+5×3)
=94 m2
Cost of painting
=Surface area of box×Cost of painting per m^2 area
=94×5
=₹ 470